Le Robot MAVIN

Introduction

Robot MavinAfin de créer - pour une association dont le nom importe peu ici - un enseignement adapté en terme de pédagogie pour des enfants à partir de 10 ans, sur le thème de l'informatique, de la programmation, de l'algorithmique et bien-sûr de la robotique, AxiomCafe a fait l'aquisition récement d'un robot MAVIN  pour en étudier la pertinence en temps qu'objet d'étude et de formation pour des enfants de cet age.
 
    MAVIN est un robot développé par la société HiTec Robotics et vendu par différents distributeurs tels Robopolis ou Lextronic. C'est chez ce dernier revendeur que l'exemplaire présenté a été acheté pour la somme de 129 euros. L'envoi a été rapide (reçu dans les 3 jours suivant la commande) et extrêment bien fait: le carton étant remplit de polystyrène pour protéger la boîte du robot. Le robot est vendu en kit avec comme promesse de pouvoir être monté en 10 minutes avec pour seul outil un petit tournevis cruciforme. Il s'accompagne d'un afficheur LCD et de 8 petits modules enfichables chacun pensé pour répondre à une tâche précise (voir description détaillée du contenu).

Description détaillée du robot

MAVIN est un robot autonome préconçu, c'est à dire qu'il dispose des fonctionnalités et des modules conçus  et vendus par le fabricant sans - à priori - que l'on ne puisse le modifier ou lui ajouter des modules maisons. A ce titre, il appartient à la catégorie des robots éducatifs dont la vocation est la découverte de la robotique, la réalisation de programmes d'entraînement simple et l'auto-formation. Voici les caractéristiques principales de ce robot:

Détail du robot

Robot Mavin- Microcontrôleur ATmega64L (lien vers la datasheet)
        -> 8 Mhz, 64K Flash, 2K EEPROM, 4K SRAM 
- 5 emplacements pour modules
- alimentation +5V fournie par 4 piles AAA.
- 2 moteurs avec réducteur
- 2 Roues motorisées et 1 roue libre
- 6 balises IR (incorporées)
        -> 3 capteurs sol
        -> 3 capteurs front
- raccord par USB
- 2 Moteurs réducteur à courant continu
- Dimensions 125 x 97 x 65 mm
- Poids 300g

Configuration PC requise

- Système d’exploitation: Windows XP™
- Processeur: Intel Pentium 3 mini. 800 MHZ
- Mémoire: mini. 256MB (512 MB conseillé)
- Disque dur: 300MB espace libre
- Résolution: 1024 x 768 (ou plus)
- USB 1.1
- Lecteur CD-ROM

Détail des modules

Module
Output
module LED module LED
Ce module présente 4 LED jaunes pouvant être utilisées de façon indépendante. 
Utile pour indiquer l'état de votre MAVIN ou pour effectuer des procédures de débogage.
module 7-segments module afficheur 7 segments
Ce module permet l'affichage d'un chiffre ou d'une lettre au moyen de 7 segments activables indépendemment et disposés en forme de 8.
Utile pour afficher une mesure courte, un mode ou un numéro de procédure.
module Buzzer module Buzzer
Ce module permet la restitution de bips sonores.
Utile pour indiquer l'état de votre robot ou pour effectuer des procédures de test. Peut aussi être utilisé pour générer des mélodies monophoniques.
module Haut-Parleur module HautParleur
Ce module permet la restitution de courtes mélodie.
Utile pour rendre l'interaction avec votre MAVIN plus conviviale.
module LCD (afficheur) module LCD
Ce module permet l'affichage de texte sur deux lignes de huit caractères chacun.
Utile pour afficher l'état du robot ou des informations personnalisées.
Modules
Input
module microphone
 
 
Intégré à la platine, ce module permet de faire réagir le robot en fonction de l'intensité sonore de son environnement.
Utile pour une meilleure intégration du robot dans son environnement et pour l'émergence d'un "comportement" (recherche ou évitement de la source sonore)
module Interrupteur
module Interrupteurs
Ce module permet l'usage de trois boutons-poussoir indépendants.
Utile pour l'apprentissage de la gestion des entrées-sorties et pour commander son MAVIN, notemment pour choisir un mode de fonctionnement ou lui donner un ordre. (3 entrées=8 états différents)
module CdS (capteur lumineux) module CdS
Ce module permet de détecter l'intensité lumineuse de l'environnement dans lequel évolue le robot.
Utile pour une meilleure intégration du robot dans son environnement et pour l'émergence d'un "comportement" (recherche ou évitement de la source lumineuse).
module Touche module Touch
Ce module est un capteur tactile. Il permet de détecter un contact avec la zone sensible du capteur (attention, il ne mesure pas la distance, seulement s'il y a ou non contact).
Utile pour faire réagir le robot à une présence (réaction aux caresses), ou pour qu'il cherche à "coller" un mobile en déplacement.
module Récepteur module Récepteur Infrarouge
Ce module (autrefois inclus sur le chassis du MAVIN) n'est utile qu'employé avec la télécommande (non fournie) vendue en complément du MAVIN. Il permet la réception à distance d'ordres en provenance de la télécommande.
Utile pour "piloter" le robot MAVIN à distance.

Les articles du dossier

Article
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Installation du logiciel de programmation graphique du MAVIN

Installation du logiciel de programmation graphique du MAVIN. Tutoriel complet illustré et détaillé.
Article
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Découverte de l'environnement de programmation graphique du MAVIN

Une visite illustrée du logiciel de programmation graphique associé au MAVIN.
Article
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Premier programme avec le MAVIN

Premier programme avec le MAVIN. Découverte de la programmation du MAVIN et du principe de boucle à travers cet exemple simple.
Article
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Programme MAVIN: Evitement d'obstacles

Le MAVIN circule et évite les obstacles qu'il rencontre. Une programmation détaillée et expliquée.
Votre note : Aucun(e) Moyenne : 2.5 (11 votes)

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